(A) sporophyte, pollen cone, microsporangia, microspores, pollen nuclei
What are the various structures of male pine trees?
Like other living things, trees use a number of reproduction techniques. The pine cone, a unique structure that pine trees have evolved, serves as the primary method of reproduction. The pine cone is essential for effective seed fertilization and aids in the spread of seeds over a large area. Typically, a single pine tree will have both male and female pine cones. Pine trees possess both male and female reproductive structures, or cones. Pine trees produce seeds to reproduce. Cones, the male and female reproductive organs of pine trees, are both present. the pollen-producing male cones.
Therefore sporophyte is the largest structure on male pine tree followed by pollen cone followed by microsporangia, microspores, pollen nuclei.
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There are five mechanisms involve in diversity of organisms:
genetic drift, mutation, natural selection, gene flow and non random mating.
Explanation:
Genetic drift: It is a mechanism in which frequency of the allele changes within a population due to random sampling. It causes decrease in diversity in organism and can result in new species.
Mutation: Mutation in the genes is the most important reason of diversity.the change in DNA causes introduction of new alleles. Harmful mutations do not le species evolve by delimiting them from reaching sexual maturity.
Gene flow: The allele flow happens when a new gene is introduced into a population either by immigration or random mating. when two populations of same species share genes, variation occurs.
Natural selection: The favourable traits for survival are transferred to the offspring. It allows them to adapt better to the environment. It allows maintenance diversity of organism.
Non random mating: The mating between the individual with varied genotype will result in genetic variation.
Answer:
I choose A, it seems loke the best choice
Explanation:
Cancer cells have abnormal nuclei
Answer:
Correct:
the time the sound arrives at each ear
the intensity of the sound in each ear
Incorrect:
place coding
Explanation:
Place coding refers to the location of the vibration on the cochlea and how that location relates to pitch.